Commonwealth legislation

AD/B747/87 - Aural and Master Fire Warning Systems

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This instrument requires operators of specified Boeing 747‑400 series aeroplanes to carry out the maintenance actions mandated by FAA Airworthiness Directive 90‑26‑08 (as set out in the Requirement Document), because certain IDS software can silence aural and master fire warnings undetected.

It affects aircraft owners, operators and maintainers—who must perform and pay for the mandated inspections/repairs—making compliance compulsory to restore reliable fire annunciation and reduce latent fire risk.

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Current sections

Direct links to the current provisions in AD/B747/87 - Aural and Master Fire Warning Systems.

AD/B747/87 - Aural and Master Fire Warning Systems

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Boeing 747 Series Aeroplanes

AD/B747/87 Aural and Master Fire Warning Systems 3/91

Applicability: All model 747-400 series aeroplanes listed in the Requirement Document. Requirement: Action in accordance with the technical requirements of FAA AD 90-26-08.

Note: Boeing Alert SB 747-26A2171 also refers.

Compliance: As specified in the Requirement Document with an effective date of 21 March 1991. Background: Reports indicate that with certain Integrated Display System (IDS) software installed,

the aural and master caution systems of the fire detection system are inoperative.

This failure cannot be identified during normal system checks, and if not corrected, could result in the failure of the system to annunciate a fire in the APU, engines, wheel wells or cargo compartments.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/B747/87 - Aural and Master Fire Warning Systems